New Roof Over Old Roof

Why installing new shingles over old shingles can be good.

New roof over old roof.

That s also why building codes commonly limit re roofing to no more than two layers. Replacing a roof can be expensive but if a roof contains only a small slope it s possible to raise the roof pitch of a house by building a roof over the old one. You can save money because there s no dump fee for removing your old roofing and there s no need for additional felt paper over the old roof. It can save you money at the time but it might actually end up costing you more in the long run.

This new roof with a higher pitch can be accomplished with premade roof trusses and typical asphalt shingles. Roofing over your old roof can save you around 1 000 on installation costs because the roofing company won t have to remove and dispose of old shingles. Let s start with the good. Installing a new roof over an existing one also called a layover or nailover is often possible although not always the best option a properly installed layover roof can look and function as well.

Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. Before you reshingle a roof read our step by step guide for adding new shingles over old ones.